Pipe wrench



J. RUNSBERG PIPE WRENCH Filed Aug. 23, .1922

CII

Patented Dec. 16, 1924.

UNITED STATES JOHN RUNSBERG, OF HOPKINS, MINNESOTA.

PIPE WRENCH.

Application led August 23, 1922.

To a//Z 207mm it /nzag/ cmi-cern; I

Be it known that l, JOHN RUNsnERG, a citizen of the United States, residing at Hopkins, inthe county ot' Hennepin and State ot lvlinnesota7 have invented a new and useful Pipe VrenCh, ot Which the following is a specilication.

This invention relates to Wrenches of the type adapted for use either' as a nutor` a pipe Wrench.

The object of the invention is to provide a simply constructed, cheaply manufactured, strong, powerful Wrench which is easily adjusted and operated, and which grips strongly and releases easily and in which the strain is equa-lized on the different parts of the Wrench,

Another object is to provide a Wrench of this type in Which the acting Jface oililthe movable jaw may adjust itself to various angles relative to the Fixed jaiv for use as a pipe Wrench and in Which there are no small parts such as are liable to break or get out of order.

Another object is to provide a Wrench having a movable aw mounted in a bearing box which is made exceptionally strong Where the strain is heaviest and so constructed that it will not spread or Warp and will equalize the strain on the Wrench, and Which eliminates the pressure of the movable jaw on the stationary j aw by allowing a straight pull on the pipe or nut and consequently a maximum power is obtained with a minimum danger of breakage.

With the foregoing and lother objects in View, Which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it heilig understood that, Within the scope of What .is claimed, changes in the precise embodiment of the invention shown can be made Without departing from the spirit of the invention.

ln the accompanying drawings:

Figure l represents a side elevation of a Wrench constructed in accordance with this invention, with the movable jaw shown in full lines in gripping position and in dotted lines in the positions Which it assumes While obtainingl the gripping effect;

Fig. 2 is a transverse section taken on the line 22 of Fig. l;

Fig. 3 is a detail longitudinal section Serial No. 583,876.

through the bearing box with the jaivs broken oli;

Fig. 1l is a. detail perspective vieiv of one ot the journal members; and

Fig. 5 is a similarl View of the other member of the journal.

In the embodiment illustrated the main body member l is of any desirable form, size and construction and is here shown provided at one end With a iixed jaw 2 having a convexed toothed gripping member 8 pivotally mounted thereon. This body member l also has a handle et such as is ordinarily found in Wrenches of this character.

A. bearing box 5 projects laterally from one edge of the body l near the fixed jaw Q. This box is cylindrical in form and has therein diametrically opposite openings 7 and S which extend parallel With the body l and through which the shank 36 of the movable jaw 35 is designed to move longitudinally.

Mounted in the casing G of the box 5 is a journal member composed of tWo se'parably connected members l() and 20 which When assembled form a unitary structure and operate as a journal in the box 5 for the movable jaw and which is connected therewith in a manner presently to be described.

The journal member is cylindrical in form, the body 1l of which fits in the casing 6 at one end thereof and is equipped with a radially extending` flange l2 Which when the parts are assembled overlies one end oik the casing. A. lug 1S extends radially from the flange l2 and is designed to cooperate With a. boss or lug 9 on one face of the bodyY member l to operate as a lock for the mov-l able javv and to limit the turning of the journal in the bearing box. This member l0 has a rectangular opening let therein Which registers With a similar opening 24 in the member and in Which is housed the adjusting nut 8O Which operates on the shank 36 of the movable jaw The member l0 has diametrically opposite recesses l5 and 1G formed on its inner face at opposite sides of the opening ll to provide in connection with similar recesses 25 and 26 in the member 20 a seat for the shank 36 of the .movable j aiv to permit said shank to reciprocate longitudinally therein and hold it against lateral movement. The inner face of the member l() is also provided with bosses l'T and 1S arranged ai" the ends lil() lllfi of the slot-like opening` 14 being diametrically opposite 'e'a'ch yother 'and which have threaded apertures 19 extending ltherethrough and through the outer faeeotthe member to receive yfastening screws 3 1 which connect the members 10 and 2O and hold theni against accidental separation. The inner faces of the bosses 17 and 1S and the end Walls ot the opening '.13511- iare-inclined outwardly as shoivn at 17 a and 18 which in connection with simil-ar faces 27 Iand 28 o-n the member 20 form seat orthe adjusting nut 50 'and I prevent it from* dropping out of the-box.

-The -member 2O which is complementary to the member 1() has thebody '21 thereof oli the same sizetund `slrapefasfthe body 11 o'tthemember 10 vso-that `4when these mei bers are united they Will Lorm a -unitary structure cylindrical in shape. rflier member 20 has anopenin'e' 2d eorresponding to the 'opening =14invthe member $10' to provide ttor the projeetion:therethrough oft the r`adjustinginut. Qn' o-ppoeitesides of' this opening are ormedre'eesses 2fand26 inthe inner faceiof the memberrand at tlieiends'of said opening vrecesses 27 'and .28 f are iformed of less depth than the Ereeesses 25 and 2G and which are i designed ito freceive "and -interloekingly engage the lbosses 117 =and 18 of .the vvmember A10. Threaded apertures 29 extend transversely through the member '2O at lthe bottoms of tbe-seats 27 `and 2S and are designed tto register -with the apertures 19 iin thelmember =10 tofreceiveitlie sereivs B1.

The 'member 20 hlasa radially extending `flange 22 flush With its outer l'faee which overIlie-s one facey of the box-5 and wvliiehhas a radially extending llug Q'S-designed tobe positioned opposite the ilug -13 of tlie fmember when -these members are `assembled. These Llugs 13 fand .23 :are designed Lto eng-age bosses 9 on -opposite fares f of the lbodiy 4-1 i adjacentithe :casing-6 and'fthe lugs and bosses havel their' meeting faees beveled as lis lshown clearly .in 1 to io'ri'n a\cl`ose joint when engaged.

The tmovable Vja-.W 05 ih'oo'lted shaped-or curved f as sho-urn ein llli'g. il Tthe fgrip'p ing 'ieee thereof being yconcaved to eooper'ate `with the oonvexgrippingf'aee ofthe awl. This concaved :gripping tace -89 is equipped with ratchet teeth `which extend lin :a :direction opposite :to ithose 'of Ithe igripping Vlmember to insure a positive engagement Ivof @the pipe i or I other :article to ybe gri ppetl itliereby.

The vshank 3610i the unovable jaw lis .pio vided =on iopposite edges with threads 37 which are designed "to ieooperate uvith the threaded interiorro't tliefnut-SO sotlrat nvhen the aint |is :rotated the :shank IWill ibe lmoved i,519,1ee

llt will -thus be seen ftlia't fsvlien *the mov-` able -j-aw isv mounted in the bearing box 5 and,hasbeen-adjusted to accommodate the pipe or other artiele to be engaged, said awwill pivot in the casing` 6 being limited in its opening movement by the engagement l'ofithefshaifiliflixvitlrthe inner Walls of the openings 7 and 8 and in its closing movement by contact ofthe lugs 13 and Q3 With the bosses 9. @bviously the outward -sivingingoffthe "mov-able jaw Will release it Strom its-clamping engagement- While its inward movement lwill cause vit to securely -grip the pipe between it i and the `jaw member 3.

The mounting o'fffthe movable jaw inlthe be-aring'b'ox '5in the mannerabove described operates to equalize i the strain on the i difierent parts oi the Wrench and ltlie peculiar lconstruction of lthe ournal members 10 and andtheir engagement "l prevents allpossr bility of -Warpin'g' or Aspree din g l o'f the Aparts :and-falso fpermits a straight Ipull to be -exerted on theo'bjeet gripped bythe nwrench thus eliminating the pressure ot the Vmovable aW on the stationary janv.

A leaf spring is preferably fifastened with a set'screwainf'the Vfront-part ot-Lthe'bearing -box for tlie `purpose of retaining the movable -j amv tight .again-st fthe Ipipe should the -ivr'enchlbe operated avith'fone fliand.

Fromthe above des'criptionit `will beobvious that the Wrench is sel'ilo'cking and will not cru'slrortlamage thelpipeiefvenfunder fthe greatest pressure.

.ln aivrench of the class-described, a body member 'having a tiered jaw at v one end7 -a bearing iboi: projecting laterally from f one edge of said bodyiandeliavingdiametrieally opposite openings fe-iitending parallel With said body, a 'journal :member mo'ui'ited fin said ibo-X and :Composed of tivo separably connected Veomplementary sections forming when `imi'ted a `unitary cylint ficaletrueture, said seetions fhaving "reg" vtering openings, an :adjusting nut amounted Lin said openings, a movable 1j aiv barril j :a -shanl extending through said ibo-x and .iut whereby l the i.turning o1r `"the nut will `adj ust fthe movable an' towardfand away .from the flixed jaw and eooperatin'g flugs carrie d bythe I box and said body Ito lock the 'jaws in Yf gripping lrelation.

In testimony lthat l lelaim the foregoing as .my own, il Lh'ave Il'iereto.'t'ir'inetl`my signature #in the "presenee o1tvvo 4`Witnesses.

"Witnesses:

C. (3. vRunen, enema BI. Minne-e. 

